Linked Questions

20 votes
3 answers
3k views

Why are magnetic fields a consequence of special relativity? [duplicate]

I'm very confused about why it is a consequence of special relativity.
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  • 451
1 vote
1 answer
658 views

Why magnetic forces MUST exist besides electric forces? [duplicate]

The discovery of electric forces resultet in the discovery of the force mediated by the electric field $\vec{E}$ (this is $\vec{F} = e \vec{E}$) at first. But later, it was observed that charges also ...
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  • 3,213
187 votes
7 answers
225k views

How do moving charges produce magnetic fields?

I'm tutoring high school students. I've always taught them that: A charged particle moving without acceleration produces an electric as well as a magnetic field. It produces an electric field ...
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  • 6,755
6 votes
4 answers
1k views

Magnetic monopoles and special relativity

I was thinking about magnetism as a product of special relativity and the result of this approach to the magnetic monopoles. So if magnetism is a product of electricity(like electricity from another ...
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6 votes
5 answers
4k views

Relativistic origin of magnetic field

There is an explanation in the Wikipedia. Unfortunately the article is quite verbose and doesn't clearly explain why both positive and negative charges vary density even if only one is moving. It is ...
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  • 1
1 vote
2 answers
176 views

How do flowing electrons generate magnetism?

I am trying to understand what magnetism really is, beyond just a field, an attractive or repulsive force. I would like to know: how do flowing electrons (e.g. electricity) generate a magnetic field?
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  • 213
1 vote
0 answers
1k views

What causes the magnetic field around a wire? [duplicate]

According to maxwell’s equations, a magnetic field is caused by a changing electric field, but where is this changing electric field in the context of a current carrying conductor that has an induced ...
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4 votes
2 answers
309 views

Is a particular force different in different frames

Can a particular real force have different magnitude in different frames?
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1 vote
2 answers
391 views

How does a wire's magnetic field appear as an electric field, when the wire is neutral? [duplicate]

It is well known that electromagnetic force depends on frame. I was reading a book, it says If a charge is moving parallel to a current carrying wire then a magnetic force will be exerted on ...
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2 votes
1 answer
208 views

How electric fields and magnetic fields are connected?

I'm not a physicist, but I have been reading several sources of how electric fields and magnetic fields are connected. One question in particular (How do moving charges produce magnetic fields?) ...
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  • 123
1 vote
1 answer
128 views

How does electric and magnetic field interchanges in light propagation? [closed]

We know that magnetism is just a illusion created because of special relativistic effects and there is only electric field which is really there in reality. so how can we say that this imaginary ...
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  • 1,192
0 votes
1 answer
109 views

Gravity Differential Equations

I was just messing around with Newton's Law of gravitation, when I had the idea of converting Newton's Law into differential form (more or less like Maxwell's equations). I did the following: #1 ...
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0 votes
0 answers
44 views

Is magnetism caused by effect of relativity on interaction between moving charges?

I have heard that cause of magnetism is easily amswered by relativity ? Is it true ? If then how can we explain cause of Fleming's left and right hand rules ?
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